package com.atguigu.chapter07;

import com.atguigu.chapter05.WaterSensor;
import org.apache.flink.api.common.eventtime.WatermarkStrategy;
import org.apache.flink.api.common.functions.MapFunction;
import org.apache.flink.streaming.api.TimeCharacteristic;
import org.apache.flink.streaming.api.datastream.KeyedStream;
import org.apache.flink.streaming.api.datastream.SingleOutputStreamOperator;
import org.apache.flink.streaming.api.datastream.WindowedStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.streaming.api.functions.KeyedProcessFunction;
import org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction;
import org.apache.flink.streaming.api.windowing.assigners.TumblingProcessingTimeWindows;
import org.apache.flink.streaming.api.windowing.time.Time;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.util.Collector;

/**
 * TODO
 *
 * @author cjp
 * @version 1.0
 * @date 2021/3/6 9:12
 */
public class Flink20_ProcessFunction_Demo {
    public static void main(String[] args) throws Exception {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setParallelism(1);

        env.setStreamTimeCharacteristic(TimeCharacteristic.ProcessingTime);

        SingleOutputStreamOperator<WaterSensor> sensorDS = env
                .socketTextStream("localhost", 9999)
                .map(new MapFunction<String, WaterSensor>() {
                    @Override
                    public WaterSensor map(String value) throws Exception {
                        // 切分
                        String[] line = value.split(",");
                        return new WaterSensor(line[0], Long.valueOf(line[1]), Integer.valueOf(line[2]));

                    }
                })
                .assignTimestampsAndWatermarks(
                        WatermarkStrategy
                                .<WaterSensor>noWatermarks()
                                .withTimestampAssigner((value, ts) -> value.getTs() * 1000L)
                );

        KeyedStream<WaterSensor, String> sensorKS = sensorDS.keyBy(sensor -> sensor.getId());

        // TODO Process
        SingleOutputStreamOperator<String> resultDS = sensorKS
                .process(
                        new KeyedProcessFunction<String, WaterSensor, String>() {
                            @Override
                            public void processElement(WaterSensor value, Context ctx, Collector<String> out) throws Exception {

                                String currentKey = ctx.getCurrentKey();
                                //TODO 获取 事件时间，数据包含的时间戳,
                                //不管什么时间语义，只要求必须在代码指定时间戳的提取，否则为 null
                                Long timestamp = ctx.timestamp();

                                out.collect("value:" + value + "\n" +
                                        "key:" + currentKey + "\n" +
                                        "timestamp:" + timestamp + "\n\n");

                            }
                        }
                );

        resultDS.print();


        env.execute();
    }
}
